EP3055877B1 - Vibration resistant automotive front lighting lamp - Google Patents
Vibration resistant automotive front lighting lamp Download PDFInfo
- Publication number
- EP3055877B1 EP3055877B1 EP14806186.4A EP14806186A EP3055877B1 EP 3055877 B1 EP3055877 B1 EP 3055877B1 EP 14806186 A EP14806186 A EP 14806186A EP 3055877 B1 EP3055877 B1 EP 3055877B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vessel
- filament
- baffle
- holding
- support member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/19—Attachment of light sources or lamp holders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/19—Attachment of light sources or lamp holders
- F21S43/195—Details of lamp holders, terminals or connectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/242—Light guides characterised by the emission area
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/18—Mountings or supports for the incandescent body
- H01K1/22—Lamp stems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/26—Screens; Filters
Definitions
- the invention relates to an electrical lamp, and in particular to a lamp for use in automotive vehicle front lighting.
- the invention further relates to a vehicle headlight.
- Automotive headlights i.e. headlights for use on board of a vehicle, such as e. g. a car, motorcycle, truck or other type of vehicle generally comprise a reflector and, mounted therein, a lamp.
- Known incandescent lamps, in particular halogen lamps generally comprise a base and a burner. The base provides mechanical and electrical connection to the automotive headlight, whereas the burner comprises the actual light-emitting element, in particular filament. Light emitted from the filament is reflected by the reflector to form a beam for illumination in front of the vehicle.
- incandescent lamps which comprise one or more filaments arranged within a vessel.
- the shield includes a flat member shown to be arranged perpendicular to the axis of the filament which engages the inner side surface of the bulb at several positions.
- the size of the member corresponds to the inner diameter of the bulb and acts as a guide when being inserted in the lamp.
- the member automatically centers the lamp stem along the axis of the bulb and restricts vibration of the shield inside the bulb when subjected to dynamic loads.
- the shape of the member is chosen such that it does not prevent the halogen cycle.
- a lamp according to claim 1 and a vehicle headlight according to claim 11 are proposed.
- a lamp according to an aspect of the invention comprises a base for mechanical and electrical connection to an automotive headlight. Electrical contacts may protrude out of the base, in particular from the rear thereof.
- the base further preferably comprises a positioning ring which serves for mounting the lamp in a reflector of a vehicle headlight in a defined position and orientation.
- the positioning ring may comprise radial protrusions, which may serve for mechanical fixing, and for exact positioning. It is in particular preferred to provide one reference protrusion to define a radial reference direction R.
- the lamp further comprises a burner with a sealed vessel, at least partially transparent, preferably of quartz glass.
- a first filament is arranged within the vessel.
- a second filament may be arranged within the vessel, provided at a distance from the first filament.
- the filaments are spaced along the longitudinal axis X of the lamp, i.e. the axis extending centrally through the positioning ring.
- a baffle is arranged proximate to a first filament.
- the baffle may in particular be arranged to cover the axial range of the first filament, i.e. be arranged in radial directions of the first filament along the whole axial length thereof.
- a portion of the light emitted from the first filament, emitted into spatial directions of the proximate baffle, will be shaded by the baffle.
- At least one holding wire is arranged within the vessel.
- the holding wires may be fixed in a pinch seal of the vessel, and may project into its interior. At least one of the holding wires may serve to hold the baffle in its position proximate to the first filament.
- the baffle may be fixed to the holding wire, preferably welded thereto. Further, the first and second filaments may be fixed to the holding wires.
- the transparent vessel comprises a vessel wall which includes a cylindrical portion surrounding at least the first filament.
- a support member is provided which is fixed to the baffle or to the holding wire.
- the support member includes at least a first part that is fixed to the baffle or holding wire, and a second part that is in contact with the cylindrical portion of the vessel.
- the support member further comprises at least one flexible intermediate part connecting the first and second parts, so that the baffle or the holding wire are resiliently supported against the vessel.
- the thus formed resilient support does not completely immobilize the baffle within the vessel, but retains a certain movement, while at the same time resiliently restricting the movement.
- the baffle and the holding wire may still move within and relative to the vessel, but the movement will be significantly less than without the support member.
- the lamp will be more resistant to vibration.
- the support member may include a first and a second flexible intermediate part or leg, and each of the legs will comprise a second part in contact with the cylindrical portion.
- the second part of the first and second flexible legs may be arranged on the inside of the vessel at different positions distant from each other.
- the second part is in one-sided contact with the interior of the vessel.
- the support member is not fixedly attached to the interior of the vessel. This facilitates manufacture of the lamp and allows a substantial degree of remaining flexibility.
- the flexible support member may be made out of a wire material, or out of a flat metal material.
- the material of the flexible support member may preferably be molybdenum.
- the metal material may be stamped and bent.
- the flexible support member may even be formed in one piece with the baffle.
- the flexible support member is positioned to be shaded from the first filament by the baffle.
- the support member, located behind the baffle as viewed from the first filament, will not lead to significant optical distortion.
- At least three holding wires are arranged to project into the interior of the vessel.
- the first filament preferably also a second filament and the baffle are fixed to the holding wires.
- a pinch seal is formed at a portion of the vessel, sealing the vessel and embedding the holding wires.
- the holding wires extend from the pinch seal into the interior of the vessel.
- a holding bar is arranged within the interior of the vessel, distant from the pinch seal. The holding bar serves to hold the holding wires, preferably by at least partially enclosing the wires within the material of the holding bar.
- the holding bar is preferably made out of glass.
- the base comprises three electrical contacts, and three holding wires are arranged extending from a pinch seal into the interior of the vessel.
- Each of the holding wires is electrically connected to one of the electrical contacts.
- the first filament is electrically connected between a first and a third holding wire
- the second filament is electrically connected between a second and the third holding wire.
- the filaments share a common electrical connection.
- the first filament is not connected directly to the third holding wire, but electrical contact is established via the baffle fixed to the third holding wire.
- the baffle may be of concave shape, e.g. provided in one piece and made out of correspondingly shaped sheet metal, in particular molybdenum.
- a front surface of the baffle may be arranged at a front axial end of the baffle, preferably the end facing towards the base, arranged at least partially in between the filaments.
- the baffle may be effective to shield the second filament from light emitted from the first filament.
- the baffle then serves to separate angular ranges illuminated by both filaments from angular ranges illuminated only by the second filament, where light emitted from the first filament is shaded at the baffle.
- Corresponding portions of the reflector may be shaped to reflect light emitted from the first filament - which may be denoted a low beam filament - into a first beam (low beam, comprising a bright/dark cutoff) and correspondingly reflect light emitted from the second filament (e. g. high-beam filament) into a reflected beam (high beam) without a bright/dark cutoff.
- first filament - which may be denoted a low beam filament - into a first beam (low beam, comprising a bright/dark cutoff) and correspondingly reflect light emitted from the second filament (e. g. high-beam filament) into a reflected beam (high beam) without a bright/dark cutoff.
- a vehicle headlight with a reflector may be equipped with a lamp according to one of the above aspects.
- the vehicle headlamp may be a motorcycle headlamp.
- Figs. 1 , 2 show a first embodiment of an automotive halogen lamp 10.
- the lamp 10 comprises a base 12 and a burner 14 fixed to the base 12.
- the base 12 comprises a positioning ring 16 which includes three positioning protrusions 18a, 18b, 18c radially protruding from the base 12 (of which only two are shown in Fig. 1 ).
- the lamp 10 may be fixed to a vehicle headlight 50 as symbolically shown in figure 4 .
- a protrusion 18c (shown in Fig. 2 ) serves as a reference protrusion defining a radial reference direction R.
- a reference plane is defined by the upper portions of the positioning protrusions 18a, 18b, 18c of the positioning ring 16.
- a longitudinal axis X of the lamp 10 is defined to run through the center of the positioning ring perpendicular to the reference plane.
- a symmetry plane may be defined by the radial reference direction R and the longitudinal axis X.
- the burner 14 comprises a glass vessel 22 of quartz glass material with a central portion 24 of generally circular cylindrical shape. At the top, the otherwise transparent vessel 22 comprises a coated portion 26 which is opaque. At the bottom, the vessel 22 is sealed in a pinch seal 28, which is fixed to the base 12.
- the holding wires 30a, 30b, 30c Projecting from the pinch seal 28 into the interior of the vessel 22 are three holding wires 30a, 30b, 30c.
- the holding wires 30a, 30b, 30c are further fixed by a holding bar 32 made out quartz glass material and arranged distant from the pinch seal 28.
- the holding wires 30a - 30c are embedded within the material of the holding bar 32.
- a first filament 34 low-beam filament, not shown in Fig. 1
- a second filament 36 high-beam filament
- a baffle 40 is arranged, welded to one of the holding wires 30c. As shown, the baffle 40 is provided to cover the axial extent of the first filament 34 and thus partially shield light emitted from the filament 34 into radial directions. Further, a front portion 42 of the baffle 40, shown in Fig. 2 , is arranged in between the first and second filaments 34, 36 and therefore serves to shield the filaments 34, 36 from one another.
- the first, low beam filament 34 is connected at one end to a first holding wire 30a and at the other end to the baffle 40, which is welded to the third holding wire 30c.
- the second, high-beam filament 36 is fixed to a second holding wire 30b and to the third holding wire 30c.
- the filaments 34, 36 are both mechanically held at defined positions within the vessel 22 and are electrically connected between the holding wires 30a, 30b, 30c.
- the holding wires are connected internally within the base 12 to electrical contacts 20 protruding from the lower portion of the base 12.
- the filaments 34, 36 may be operated by supplying electrical power at the electrical contacts 20.
- the filaments 34, 36 are each provided as a single winding structure of filament wire wound around a straight filament axis.
- An axis of the first filament 34 and an axis of the second filament 36 are arranged in parallel to the longitudinal axis X of the lamp 10.
- the baffle 40 comprises a bottom surface 41 from which a front surface, a back surface, and side surfaces extend, which terminate in side edges 48. At the back surface, an attachment tab 52 is integrally formed.
- the attachment tab 52 serves to connect the filament wire of the first filament 34 to the baffle 40. As shown, the filament wire of the first filament 34 is welded to the attachment tab 52.
- a support member 38 is attached to the lower surface 41 of the baffle 40.
- the support member 38 is made out of a stamped and bent piece of sheet metal material. It comprises a central bar 39 connected to outer bars 43 by legs 37.
- the outer bars 43 lie flat against the inner surface of the wall of the vessel 22 within the cylindrical portion 24.
- the legs 37 are flexible, so that the baffle 40, attached to the central bar 39 is resiliently supported on the interior surface of the vessel 22.
- the baffle 40 due to vibration will still lead to movement of the baffle 40 relative to the vessel 22, however, the movement of the baffle 40 will be limited by the resilient support 38 which rests on the inside of the vessel 22.
- the support member 38 is provided at the back side 41 of the baffle 40, and is thus shaded from the first filament 34 by the baffle 40. Consequently, no optical distortion is caused by the support member 38.
- Fig. 3 shows a part of a lamp according to a second embodiment.
- the lamp according to the second embodiment differs from the lamp 10 described above only with regard to a different support member.
- the different support member will be explained in detail for the second embodiment, and like parts of the lamp according to the second embodiment will be designated by like reference numerals.
- a support member 138 is formed as a tab integral with the baffle 40.
- the tab 138 is formed at one side of the attachment tab 52.
- the tab 138 serving as support member has a flexible leg 137 extending up to the interior of the vessel 22, of which an end 143 rests resiliently against the interior surface thereof.
- FIG. 4 A further embodiment of a lamp is shown in Fig. 4 , which differs from the previous embodiments by a still different support member.
- the different support member will be explained in detail for the third embodiment, and like parts of the lamp according to the third embodiment will be designated by like reference numerals.
- a support member 238 is provided as a wire clamped to the attachment tab 52 of the baffle 40.
- the wire may be made out of tungsten, or preferably molybdenum.
- the end of the attachment tab 52 is bent to hold the wire 238 which projects to both sides as flexible portions 238a, 238b, the ends of which are resiliently pressed to the interior of the glass vessel 22.
- the lamp with a support member 238 may be manufactured especially easily, because the wire 238 may be provided with a length slightly longer than the diameter of the vessel 22.
- the wire 238 resiliently bends and the ends abut against the interior of the vessel.
- the wire 238 may be provided initially straight, such that the bend at the ends 238a, 238b is formed by insertion. This initial straight form may in particular be used for a wire of lower diameter and resulting lower resilient forces acting on the interior of the vessel wall. Alternatively, in particular for a wire of larger diameter, the wire may be prebent at the ends to facilitate insertion into the vessel 22.
- the lamp according to the third embodiment also shows good vibration resistance.
- the resilient contact of the ends of the wire 238 on both sides against the vessel 22 stabilizes the baffle 40, while the flexible nature of the bent ends 238a, 238b still allows flexibility.
- Fig. 5 shows schematically a headlight 50 where the lamp 10 as described above is schematically shown arranged within a reflector 46.
- Light emitted from the filaments 34, 36 (not shown in Fig. 3 ) is reflected by the reflector 46 to form different illumination beams.
- Light from the second (high-beam) filament 36 is shown as a dotted line to be reflected by both the upper and lower part of the reflector 46 to form a high-beam without a bright/dark cutoff.
- first low-beam filament 34 Light emitted from the first low-beam filament 34 is shown as a dashed line to be partially shielded by the baffle 40 such that only an upper portion of the reflector 46 is illuminated.
- the upper portion of reflector 46 is shaped to reflect the light from the first filament 34 to form an illumination beam with a horizontal bright/dark cutoff. In the resulting low beam, there is no distortion from the support member 38, because of the position thereof behind the baffle 40.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
- The invention relates to an electrical lamp, and in particular to a lamp for use in automotive vehicle front lighting. The invention further relates to a vehicle headlight.
- Automotive headlights, i.e. headlights for use on board of a vehicle, such as e. g. a car, motorcycle, truck or other type of vehicle generally comprise a reflector and, mounted therein, a lamp. Known incandescent lamps, in particular halogen lamps, generally comprise a base and a burner. The base provides mechanical and electrical connection to the automotive headlight, whereas the burner comprises the actual light-emitting element, in particular filament. Light emitted from the filament is reflected by the reflector to form a beam for illumination in front of the vehicle.
- Different types of incandescent lamps are known, which comprise one or more filaments arranged within a vessel.
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SU431581A1 - According to an aspect of the invention, a lamp according to claim 1 and a vehicle headlight according to claim 11 are proposed.
- A lamp according to an aspect of the invention comprises a base for mechanical and electrical connection to an automotive headlight. Electrical contacts may protrude out of the base, in particular from the rear thereof. The base further preferably comprises a positioning ring which serves for mounting the lamp in a reflector of a vehicle headlight in a defined position and orientation. The positioning ring may comprise radial protrusions, which may serve for mechanical fixing, and for exact positioning. It is in particular preferred to provide one reference protrusion to define a radial reference direction R.
- The lamp further comprises a burner with a sealed vessel, at least partially transparent, preferably of quartz glass. According to the invention, at least a first filament is arranged within the vessel. In preferred embodiments, a second filament may be arranged within the vessel, provided at a distance from the first filament. Preferably, the filaments are spaced along the longitudinal axis X of the lamp, i.e. the axis extending centrally through the positioning ring.
- According to one aspect, a baffle is arranged proximate to a first filament. As will become apparent in connection with preferred embodiments, the baffle may in particular be arranged to cover the axial range of the first filament, i.e. be arranged in radial directions of the first filament along the whole axial length thereof. Thus, a portion of the light emitted from the first filament, emitted into spatial directions of the proximate baffle, will be shaded by the baffle.
- At least one holding wire is arranged within the vessel. In preferred embodiments, two or three holding wires are provided. The holding wires may be fixed in a pinch seal of the vessel, and may project into its interior. At least one of the holding wires may serve to hold the baffle in its position proximate to the first filament. The baffle may be fixed to the holding wire, preferably welded thereto. Further, the first and second filaments may be fixed to the holding wires.
- According to an aspect of the invention, the transparent vessel comprises a vessel wall which includes a cylindrical portion surrounding at least the first filament. According to an aspect of the invention, a support member is provided which is fixed to the baffle or to the holding wire. The support member includes at least a first part that is fixed to the baffle or holding wire, and a second part that is in contact with the cylindrical portion of the vessel. The support member further comprises at least one flexible intermediate part connecting the first and second parts, so that the baffle or the holding wire are resiliently supported against the vessel.
- The thus formed resilient support does not completely immobilize the baffle within the vessel, but retains a certain movement, while at the same time resiliently restricting the movement. Under the influence of forces of inertia caused e.g. by vibration, the baffle and the holding wire may still move within and relative to the vessel, but the movement will be significantly less than without the support member. Thus, the lamp will be more resistant to vibration.
- According to preferred embodiments, the support member may include a first and a second flexible intermediate part or leg, and each of the legs will comprise a second part in contact with the cylindrical portion. The second part of the first and second flexible legs may be arranged on the inside of the vessel at different positions distant from each other.
- In a preferred embodiment, the second part is in one-sided contact with the interior of the vessel. Thus, preferably, the support member is not fixedly attached to the interior of the vessel. This facilitates manufacture of the lamp and allows a substantial degree of remaining flexibility.
- According to a different embodiment, the flexible support member may be made out of a wire material, or out of a flat metal material. The material of the flexible support member may preferably be molybdenum. The metal material may be stamped and bent. In one embodiment, the flexible support member may even be formed in one piece with the baffle.
- In a preferred embodiment, the flexible support member is positioned to be shaded from the first filament by the baffle. Thus, the support member, located behind the baffle as viewed from the first filament, will not lead to significant optical distortion.
- According to a preferred embodiment of the invention, at least three holding wires are arranged to project into the interior of the vessel. The first filament, preferably also a second filament and the baffle are fixed to the holding wires. A pinch seal is formed at a portion of the vessel, sealing the vessel and embedding the holding wires. Thus, the holding wires extend from the pinch seal into the interior of the vessel. Further, a holding bar is arranged within the interior of the vessel, distant from the pinch seal. The holding bar serves to hold the holding wires, preferably by at least partially enclosing the wires within the material of the holding bar. The holding bar is preferably made out of glass.
- According to one embodiment, the base comprises three electrical contacts, and three holding wires are arranged extending from a pinch seal into the interior of the vessel. Each of the holding wires is electrically connected to one of the electrical contacts. The first filament is electrically connected between a first and a third holding wire, and the second filament is electrically connected between a second and the third holding wire. Thus, the filaments share a common electrical connection. Preferably, the first filament is not connected directly to the third holding wire, but electrical contact is established via the baffle fixed to the third holding wire.
- In preferred embodiments, the baffle may be of concave shape, e.g. provided in one piece and made out of correspondingly shaped sheet metal, in particular molybdenum. A front surface of the baffle may be arranged at a front axial end of the baffle, preferably the end facing towards the base, arranged at least partially in between the filaments. Thus, the baffle may be effective to shield the second filament from light emitted from the first filament. The baffle then serves to separate angular ranges illuminated by both filaments from angular ranges illuminated only by the second filament, where light emitted from the first filament is shaded at the baffle. Corresponding portions of the reflector may be shaped to reflect light emitted from the first filament - which may be denoted a low beam filament - into a first beam (low beam, comprising a bright/dark cutoff) and correspondingly reflect light emitted from the second filament (e. g. high-beam filament) into a reflected beam (high beam) without a bright/dark cutoff.
- According to a further aspect, a vehicle headlight with a reflector may be equipped with a lamp according to one of the above aspects. In particular, the vehicle headlamp may be a motorcycle headlamp.
- These and other aspects of the invention will become apparent from and elucidated with reference to the embodiment described hereinafter.
- In the drawings
-
Fig. 1 shows a perspective view of a lamp according to a first embodiment of the invention. -
Fig. 2 shows a side view of the lamp ofFig. 1 in the horizontal operating position. -
Fig. 3 shows an enlarged perspective view of a portion of a lamp according to a second embodiment. -
Fig. 4 shows an enlarged perspective view of a portion of a lamp according to a third embodiment. -
Fig. 5 shows in a schematic representation a vehicle headlight with a lamp according toFig. 1 . -
Figs. 1 ,2 show a first embodiment of anautomotive halogen lamp 10. - The
lamp 10 comprises abase 12 and aburner 14 fixed to thebase 12. - The
base 12 comprises apositioning ring 16 which includes threepositioning protrusions Fig. 1 ). - The
lamp 10 may be fixed to avehicle headlight 50 as symbolically shown infigure 4 . Aprotrusion 18c (shown inFig. 2 ) serves as a reference protrusion defining a radial reference direction R. A reference plane is defined by the upper portions of thepositioning protrusions positioning ring 16. A longitudinal axis X of thelamp 10 is defined to run through the center of the positioning ring perpendicular to the reference plane. A symmetry plane may be defined by the radial reference direction R and the longitudinal axis X. - The
burner 14 comprises aglass vessel 22 of quartz glass material with acentral portion 24 of generally circular cylindrical shape. At the top, the otherwisetransparent vessel 22 comprises acoated portion 26 which is opaque. At the bottom, thevessel 22 is sealed in apinch seal 28, which is fixed to thebase 12. - Projecting from the
pinch seal 28 into the interior of thevessel 22 are three holdingwires wires bar 32 made out quartz glass material and arranged distant from thepinch seal 28. The holdingwires 30a - 30c are embedded within the material of the holdingbar 32. Further, fixed to the holdingwires Fig. 1 ) and a second filament 36 (high-beam filament). - Proximate to the
first filament 34, abaffle 40 is arranged, welded to one of the holdingwires 30c. As shown, thebaffle 40 is provided to cover the axial extent of thefirst filament 34 and thus partially shield light emitted from thefilament 34 into radial directions. Further, afront portion 42 of thebaffle 40, shown inFig. 2 , is arranged in between the first andsecond filaments filaments - As also shown in
Fig. 2 , the first,low beam filament 34 is connected at one end to afirst holding wire 30a and at the other end to thebaffle 40, which is welded to thethird holding wire 30c. The second, high-beam filament 36 is fixed to asecond holding wire 30b and to thethird holding wire 30c. By these connections, thefilaments vessel 22 and are electrically connected between the holdingwires base 12 toelectrical contacts 20 protruding from the lower portion of thebase 12. Thus, thefilaments electrical contacts 20. - The
filaments first filament 34 and an axis of thesecond filament 36 are arranged in parallel to the longitudinal axis X of thelamp 10. - The
baffle 40 comprises abottom surface 41 from which a front surface, a back surface, and side surfaces extend, which terminate in side edges 48. At the back surface, anattachment tab 52 is integrally formed. Theattachment tab 52 serves to connect the filament wire of thefirst filament 34 to thebaffle 40. As shown, the filament wire of thefirst filament 34 is welded to theattachment tab 52. - As shown in
Fig. 1 ,Fig. 2 , asupport member 38 is attached to thelower surface 41 of thebaffle 40. Thesupport member 38 is made out of a stamped and bent piece of sheet metal material. It comprises acentral bar 39 connected toouter bars 43 bylegs 37. - As shown in
Fig. 1 ,Fig. 2 , theouter bars 43 lie flat against the inner surface of the wall of thevessel 22 within thecylindrical portion 24. - The
legs 37 are flexible, so that thebaffle 40, attached to thecentral bar 39 is resiliently supported on the interior surface of thevessel 22. Thus, external forces acting on thebaffle 40 due to vibration will still lead to movement of thebaffle 40 relative to thevessel 22, however, the movement of thebaffle 40 will be limited by theresilient support 38 which rests on the inside of thevessel 22. - As shown, the
support member 38 is provided at theback side 41 of thebaffle 40, and is thus shaded from thefirst filament 34 by thebaffle 40. Consequently, no optical distortion is caused by thesupport member 38. -
Fig. 3 shows a part of a lamp according to a second embodiment. The lamp according to the second embodiment differs from thelamp 10 described above only with regard to a different support member. Thus, in the following description only the different support member will be explained in detail for the second embodiment, and like parts of the lamp according to the second embodiment will be designated by like reference numerals. - In the second embodiment as shown in
Fig. 3 , asupport member 138 is formed as a tab integral with thebaffle 40. In the example shown, thetab 138 is formed at one side of theattachment tab 52. Thetab 138 serving as support member has aflexible leg 137 extending up to the interior of thevessel 22, of which anend 143 rests resiliently against the interior surface thereof. - A further embodiment of a lamp is shown in
Fig. 4 , which differs from the previous embodiments by a still different support member. In the following description only the different support member will be explained in detail for the third embodiment, and like parts of the lamp according to the third embodiment will be designated by like reference numerals. - In the embodiment according to
Fig. 4 , asupport member 238 is provided as a wire clamped to theattachment tab 52 of thebaffle 40. The wire may be made out of tungsten, or preferably molybdenum. The end of theattachment tab 52 is bent to hold thewire 238 which projects to both sides asflexible portions glass vessel 22. - The lamp with a
support member 238 may be manufactured especially easily, because thewire 238 may be provided with a length slightly longer than the diameter of thevessel 22. As the holdingwires baffle 40 and thefilaments glass sleeve 22, thewire 238 resiliently bends and the ends abut against the interior of the vessel. Thewire 238 may be provided initially straight, such that the bend at theends vessel 22. - The lamp according to the third embodiment also shows good vibration resistance. The resilient contact of the ends of the
wire 238 on both sides against thevessel 22 stabilizes thebaffle 40, while the flexible nature of the bent ends 238a, 238b still allows flexibility. -
Fig. 5 shows schematically aheadlight 50 where thelamp 10 as described above is schematically shown arranged within areflector 46. Light emitted from thefilaments 34, 36 (not shown inFig. 3 ) is reflected by thereflector 46 to form different illumination beams. Light from the second (high-beam)filament 36 is shown as a dotted line to be reflected by both the upper and lower part of thereflector 46 to form a high-beam without a bright/dark cutoff. - Light emitted from the first low-
beam filament 34 is shown as a dashed line to be partially shielded by thebaffle 40 such that only an upper portion of thereflector 46 is illuminated. The upper portion ofreflector 46 is shaped to reflect the light from thefirst filament 34 to form an illumination beam with a horizontal bright/dark cutoff. In the resulting low beam, there is no distortion from thesupport member 38, because of the position thereof behind thebaffle 40. - While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiment.
- Variations from the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure and the appended claims. In the claims the word "comprising" does not exclude other elements, and the indefinite articles "a" or "an" do not exclude a plurality.
- The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope.
Claims (11)
- Lamp for automotive vehicle front lighting, comprising- a base (12) for mechanical and electrical connection to an automotive headlight (50),- a burner (14) fixed to said base (12), said burner (14) comprising a sealed transparent vessel (22),- at least a first filament (34) arranged within said vessel (22),- at least one holding wire (30c) arranged within said vessel (22), and a baffle (40) arranged proximate to said first filament (34) to partially shield light emitted from said first filament (34), said baffle (40) being fixed to said holding wire (30c),- where said transparent vessel (22) comprises a cylindrical portion (24) surrounding said first filament (34),- and where a support member (38, 138, 238) is provided including at least a first part (39) fixed to said baffle (40) or to said holding wire (30c), and a second part (43, 143, 238a, 238b), said second part (43, 143, 238a, 238b) being in contact with said cylindrical portion (24) of said vessel (22), where said support member (38, 138, 238) comprises at least one flexible intermediate part (37, 143) connecting said first and second parts (39, 43, 143, 238a, 238b), such that said baffle (40) or said holding wire (30c) is supported resiliently against said vessel (22).
- Lamp according to claim 1, wherein- said support member includes a first and a second leg (37), where each of said legs (37) comprises a second part in contact with said cylindrical portion (24) of said vessel (22).
- Lamp according to one of the above claims, wherein- said second part (43) is in one-sided contact with an interior wall of said vessel (22).
- Lamp according to one of the above claims, wherein- said flexible support member (138) is formed in one piece with said baffle (40).
- Lamp according to one of the above claims, wherein- said flexible support member (38, 138) is made out of flat metal material.
- Lamp according to one of the above claims, wherein- said flexible support member (238) is made out of a metal wire.
- Lamp according to one of the above claims, wherein- said flexible support member is positioned to be shaded from said first filament (24) by said baffle (40).
- Lamp according to one of the above claims, further comprising- at least a second filament (36) arranged within said vessel (22).
- Lamp according to one of the above claims, wherein- at least three holding wires (30a, 30b, 30c) are arranged within said vessel (22), and said filaments (34, 36) and said baffle (40) are fixed to said holding wires (30a, 30b, 30c),- where said holding wires (30a, 30b, 30c) extend from a pinch seal (28) of said vessel (22) into the interior of said vessel (22),- and where a holding bar (32) is arranged distant from said pinch seal (28), said holding bar (32) enclosing said holding wires (30a, 30b, 30c).
- Lamp according to one of the above claims, wherein- said base (12) comprises three electrical contacts (20),- and three holding wires (30a, 30b, 30c) are arranged extending from a pinch seal (28) of said vessel (22) into the interior of said vessel (22), each of said holding wires (30a, 30b, 30c) being electrically connected to one of said electrical contacts (20),- where said first filament (34) is electrically connected between a first and a third holding wire (30a, 30c), and where a second filament (36) is electrically connected between a second and said third holding wire (30b, 30c).
- Vehicle headlight, comprising- a reflector (46),- and a lamp (10) according to one of the above claims.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14806186.4A EP3055877B1 (en) | 2013-10-09 | 2014-09-29 | Vibration resistant automotive front lighting lamp |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13187951 | 2013-10-09 | ||
PCT/EP2014/070741 WO2015052023A2 (en) | 2013-10-09 | 2014-09-29 | Vibration resistant automotive front lighting lamp |
EP14806186.4A EP3055877B1 (en) | 2013-10-09 | 2014-09-29 | Vibration resistant automotive front lighting lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3055877A2 EP3055877A2 (en) | 2016-08-17 |
EP3055877B1 true EP3055877B1 (en) | 2016-11-23 |
Family
ID=49378087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14806186.4A Not-in-force EP3055877B1 (en) | 2013-10-09 | 2014-09-29 | Vibration resistant automotive front lighting lamp |
Country Status (5)
Country | Link |
---|---|
US (1) | US9899207B2 (en) |
EP (1) | EP3055877B1 (en) |
JP (1) | JP6722582B2 (en) |
CN (1) | CN105593970B (en) |
WO (1) | WO2015052023A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11199297B2 (en) * | 2017-03-10 | 2021-12-14 | Lumileds Llc | LED lamp |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3469140A (en) * | 1967-02-13 | 1969-09-23 | Westinghouse Electric Corp | Single-ended electric incandescent lamp with improved base and terminal structure,and method of assembly |
NL154058B (en) * | 1968-06-08 | 1977-07-15 | Philips Nv | HALOGEN BULB FOR VEHICLE LIGHTING. |
GB1313531A (en) * | 1970-04-16 | 1973-04-11 | Thorn Electrical Ind Ltd | Incandescent lamp manufacture |
SU431581A1 (en) * | 1972-05-06 | 1974-06-05 | ||
SU571846A2 (en) * | 1976-05-04 | 1977-09-05 | Предприятие П/Я В-2547 | Automobile headlight two-filament lamp |
FR2514948B1 (en) * | 1981-10-16 | 1985-06-07 | Lampes Elect Fab Reunies | TWO-FILAMENT INCANDESCENT ELECTRIC LAMP FOR MOTOR VEHICLE |
DE3616673A1 (en) * | 1986-05-16 | 1987-11-19 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | HALOGEN BULB |
JPS6349760U (en) * | 1986-09-18 | 1988-04-04 | ||
NL8702968A (en) * | 1987-02-25 | 1988-09-16 | Philips Nv | ELECTRIC BULB AND BLOWED BALLOON FOR IT. |
JPH0242363U (en) * | 1988-09-14 | 1990-03-23 | ||
JP4057090B2 (en) * | 1996-06-06 | 2008-03-05 | 本田技研工業株式会社 | Light bulb for vehicle |
JP4577535B2 (en) * | 1997-04-28 | 2010-11-10 | オスラム シルバニア インコーポレイテッド | Car lamp with glare control |
WO2015036300A1 (en) * | 2013-09-13 | 2015-03-19 | Koninklijke Philips N.V. | Vibration resistant automotive front lighting lamp |
-
2014
- 2014-09-29 CN CN201480055687.7A patent/CN105593970B/en not_active Expired - Fee Related
- 2014-09-29 WO PCT/EP2014/070741 patent/WO2015052023A2/en active Application Filing
- 2014-09-29 US US15/025,388 patent/US9899207B2/en not_active Expired - Fee Related
- 2014-09-29 EP EP14806186.4A patent/EP3055877B1/en not_active Not-in-force
- 2014-09-29 JP JP2016520602A patent/JP6722582B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
CN105593970A (en) | 2016-05-18 |
US20160217996A1 (en) | 2016-07-28 |
JP2016536745A (en) | 2016-11-24 |
US9899207B2 (en) | 2018-02-20 |
CN105593970B (en) | 2017-10-20 |
WO2015052023A3 (en) | 2015-07-16 |
EP3055877A2 (en) | 2016-08-17 |
WO2015052023A2 (en) | 2015-04-16 |
JP6722582B2 (en) | 2020-07-15 |
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